package com.lmz.product.service.impl;

import com.alibaba.fastjson.TypeReference;
import com.lmz.common.utils.R;
import com.lmz.product.VO.SeckillInfoVo;
import com.lmz.product.VO.itemVo.SkuItemVo;
import com.lmz.product.entity.SkuImagesEntity;
import com.lmz.product.entity.SpuInfoDescEntity;
import com.lmz.product.feign.SeckillFeignService;
import com.lmz.product.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ThreadPoolExecutor;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.lmz.common.utils.PageUtils;
import com.lmz.common.utils.Query;

import com.lmz.product.dao.SkuInfoDao;
import com.lmz.product.entity.SkuInfoEntity;
import org.springframework.util.StringUtils;


@Service("skuInfoService")
public class SkuInfoServiceImpl extends ServiceImpl<SkuInfoDao, SkuInfoEntity> implements SkuInfoService {
    @Autowired
    private SkuImagesService imagesService;
    @Autowired
    private SpuInfoDescService spuInfoDescService;
    @Autowired
    private AttrGroupService attrGroupService;
    @Autowired
    private SkuSaleAttrValueService skuSaleAttrValueService;
    @Autowired
    private SeckillFeignService seckillFeignService;
    @Autowired
    private ThreadPoolExecutor executor;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<SkuInfoEntity> page = this.page(
                new Query<SkuInfoEntity>().getPage(params),
                new QueryWrapper<>()
        );

        return new PageUtils(page);
    }

    @Override
    public void saveSkuInfo(SkuInfoEntity skuInfoEntity) {
        this.baseMapper.insert(skuInfoEntity);
    }

    @Override
    public PageUtils queryPageByCondition(Map<String, Object> params) {
        QueryWrapper<SkuInfoEntity> queryWrapper = new QueryWrapper<>();
        /*
         * key:
         * catelogId: 0
         * brandId: 0
         * min: 0
         * max: 0
         */
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            queryWrapper.and((wrapper) -> {
                wrapper.eq("sku_id", key).or().like("sku_name", key);
            });
        }

        String catelogId = (String) params.get("catelogId");
        if (!StringUtils.isEmpty(catelogId) && !"0".equalsIgnoreCase(catelogId)) {

            queryWrapper.eq("catalog_id", catelogId);
        }

        String brandId = (String) params.get("brandId");
        if (!StringUtils.isEmpty(brandId) && !"0".equalsIgnoreCase(catelogId)) {
            queryWrapper.eq("brand_id", brandId);
        }

        String min = (String) params.get("min");
        if (!StringUtils.isEmpty(min)) {
            queryWrapper.ge("price", min);
        }

        String max = (String) params.get("max");

        if (!StringUtils.isEmpty(max)) {
            try {
                BigDecimal bigDecimal = new BigDecimal(max);

                if (bigDecimal.compareTo(new BigDecimal("0")) == 1) {
                    queryWrapper.le("price", max);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
        IPage<SkuInfoEntity> page = this.page(
                new Query<SkuInfoEntity>().getPage(params),
                queryWrapper
        );
        return new PageUtils(page);
    }

    @Override
    public List<SkuInfoEntity> getSkusBySpuId(Long spuId) {
        List<SkuInfoEntity> list = this.list(new QueryWrapper<SkuInfoEntity>().eq("spu_id", spuId));
        return list;
    }

    @Override
    public SkuItemVo item(Long skuId) throws ExecutionException, InterruptedException {
        SkuItemVo skuItemVo = new SkuItemVo();

        CompletableFuture<Void> imgFuture = CompletableFuture.runAsync(() -> {
            //sku图片信息 pms_sku_images
            List<SkuImagesEntity> images = imagesService.getImagesBySkuId(skuId);
            skuItemVo.setImages(images);
        }, executor);

        CompletableFuture<Void> seckillInfoFuture = CompletableFuture.runAsync(() -> {
            //查询当前sku是否参与秒杀
            R r = seckillFeignService.skuSeckillInfo(skuId);
            if (r.getCode() == 0) {
                SeckillInfoVo sekillSkuRedisVo = r.getData("data", new TypeReference<SeckillInfoVo>() {
                });
                skuItemVo.setSeckillInfo(sekillSkuRedisVo);
            }
        }, executor);

        CompletableFuture<SkuInfoEntity> infoFuture = CompletableFuture.supplyAsync(() -> {
            //sku基本信息 pms_sku_info
            SkuInfoEntity info = getById(skuId);
            skuItemVo.setInfo(info);
            return info;
        }, executor);

        CompletableFuture<Void> saleFuture = infoFuture.thenAcceptAsync((res) -> {
            //spu销售属性组合
            List<SkuItemVo.skuItemSaleAttrsVo> saleAttrsVo = skuSaleAttrValueService.getSaleAttrsBySpuId(res.getSpuId());
            skuItemVo.setSaleAttr(saleAttrsVo);
        }, executor);

        CompletableFuture<Void> descFuture = infoFuture.thenAcceptAsync((res) -> {
            //spu介绍信息  pms_spu_info_desc
            SpuInfoDescEntity spuInfo = spuInfoDescService.getById(res.getSpuId());
            skuItemVo.setDesc(spuInfo);
        }, executor);

        CompletableFuture<Void> baseFuture = infoFuture.thenAcceptAsync((res) -> {
            //spu规格参数信息
            Long spuId = res.getSpuId();
            Long catalogId = res.getCatalogId();
            List<SkuItemVo.SpuItemAttrGroupVo> groupAttrs = attrGroupService.getAttrGroupWithAttrsBySpuId(spuId, catalogId);
            skuItemVo.setGroupAttrs(groupAttrs);
        }, executor);

        //等待所有任务都完成再返回数据
        CompletableFuture.allOf(seckillInfoFuture, imgFuture, saleFuture, descFuture, baseFuture).get();

        return skuItemVo;
    }

}